13 write a numerical expression to represent “20 minus
the product of 5 and 2." then evaluate your
expression.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

In the diagram, gef and hef are congruent. what is the value of x

Which expression and diagram represent “renee biked four times as far this month as last month”?